William w



(N0 ModeL) W. W. WALLACE.

MOLD FOR CASTING ROLLS. No. 327,840.

Patented Odt. 6, 1885. 1 66.1, 0

149 1501 Aft (2,545 I? 2? QQQ KZ 14; :1

- UNITED STATES PATENT OFFICE.

WILLIAM W. WALLACE, OF FRANKFORT, INDIANA, ASSIGNORTO THE WALLACEMANUFACTURING COMPANY, OF SAME PLACE.

MOLD FOR CASTING ROLLS.

SPECIFICATION forming part of Letters Patent No. 327,840, dated October6, 1885.

Application filed June 4, 1884.

To all whom it may concern:

Be it known that I, WILLIAM W. WALLACE, a citizen of the United States,and a resident of Frankfort, in the county of Clinton and State ofIndiana, have invented certain new and useful Improvements in Molds forCasting Rolls, of which the following is a specification.

My invention relates to an improved mold for casting grooved orcorrugated rolls with a chilled surface, and has for its object toprevent the shrinking or expansion of the mold, whereby rolls withperfectly round surfaces are formed that do not require to be turned offto make them true.

The invention consists in making a mold or chill of three or moresegmental sections, each section being provided with outwardly-extendingflanges of great strength, which fit counter-flanges of adjacentsections, and are detaehably secured together by clampingbolts, wherebya mold is produced in which a uniform expansion of the metal forming theroll is secured and an unequal contraction varying from a circle isprevented.

In the drawings, Figure 1 represents a side elevation of my sectionalmold. Fig. 2 is a vertical cross-section of the same. Fig. 3 is aperspective view of one of the mold-sections. Fig. 4 is a verticalsectional view representing the relative arrangement of an ordinary copeand drag with my improved mold.

Sectional molds have heretofore been resorted to for casting corrugatedrolls; but they possess the disadvantage of allowing the cast article toreceive an elongated and flattened form, due to the unequal expansion ofthe metal forming the surface of the mold, and for such reason rollsthus cast require to be turned or finished to make them perfectly true.

I have discovered that by making the mold of three or more sectionswhich are united by flanges and bolts the expansion such a Serial No.133,838. (No model.)

mold is liable to receive is not sufficient to materially change theform of the cylindrical roll from a true circle.

The letters A B C D represent the segments or sections comprising mymold. They are formed with edge flanges, e, which, when placed together,are secured by means of bolts i, or other suitable devices capable offirmly uniting the flanged sections. In other words, I do not wish tolimit myself to the use of screwbolts passing through the flanges e foruniting the mold-sections, as other forms of clamps may be resorted to,provided they are suffiany suitable manner and serve to form the Pjournals of the roll, as is readily apparent.

Having thus described my invention, what I claim is A mold for castingcorrugated rolls,consisting of three or more segmental sections havingcoupling-flanges e, and the bolts or clamps connected with said flangesfor securing the parts rigidly together, substantially as herein setforth.

In testimony whereof I have hereunto set my hand.

WILLIAM W. WALLACE.

Witnesses:

ELI MARVIN, S. O. BORHER.

